Been using coffeescript for back end and front end work and would be good to support that as well. Could probably use the python or ruby modules as a base (once they have been implemented) or better yet, do use coffeescript as a base for ruby and python :)

SemanticMerge opens up files one at a time when I issue git difftool/mergetool commands. This is a pain since with several files when the context is important and moving back and forth between files is often necessary. Git's option --dir-diff was designed to address this - but it doesn't work with SemanticMerge. Beyond Compare supports this and as such I find myself using it more, much as I prefer the SemanticMerge UI.